Hey guys apologies if this has come up before .
Back story .
Ive changed plugs,leads, adjusted timing 15d BTDC done the dizzy and rotor button cylinder 1
Checked resistance on injectors all.avg 3 ohms
The car takes of alright maybe a little hesitation .but massively struggle to.get over 4000rpm surging. ??
any help would.be appreciated
Thanks apologies again if this has come up before